A torch bulb when cold has a resistance 1 `Omega `. It draws a current 300 mA, when glowing from a source of potential differences 3 V. Calculate the resistance of the bulb when glowing and explain the reason for the difference in resistance.

Explanation

To solve the problem, we will follow these steps:

### Step 1: Identify the Given Values
- Cold resistance of the bulb, \( R_0 = 1 \, \Omega \)
- Current when glowing, \( I = 300 \, \text{mA} = 300 \times 10^{-3} \, \text{A} = 0.3 \, \text{A} \)
- Potential difference (voltage), \( V = 3 \, \text{V} \)

### Step 2: Use Ohm's Law to Find the Resistance When Glowing
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